Lexus ES: Lost Communication With ECM/PCM "A" Missing Message (U010087,U012987,U014087,U016487,U029387,U115187)
DESCRIPTION
These DTCs are stored when a malfunction occurs in the CAN communication circuit.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U010087 | Lost Communication With ECM/PCM "A" Missing Message | Stereo component equalizer assembly detects CAN communication malfunction in engine system for 1 second or more continuously, 3 seconds or more after power switch is turned on (IG)* | CAN communication system |
| U012987 | Lost Communication With Brake System Control Module Missing Message | Stereo component equalizer assembly detects CAN communication malfunction in brake system for 1 second or more continuously, 3 seconds or more after power switch is turned on (IG)* | CAN communication system |
| U014087 | Lost Communication with Body Control Module Missing Message | Stereo component equalizer assembly detects CAN communication malfunction in main body ECU for 3 seconds or more continuously, 3 seconds or more after power switch is turned on (IG)* | CAN communication system |
| U016487 | Lost Communication with HVAC Control Module Missing Message | Stereo component equalizer assembly detects CAN communication malfunction in the air conditioning system for 25 seconds or more continuously 3 seconds after the power switch is turned on (IG)* | CAN communication system |
| U029387 | Lost Communication With Hybrid Powertrain Control Module Missing Message | Stereo component equalizer assembly detects CAN communication malfunction in the HV system for 1 second or more continuously 3 seconds after the power switch is turned on (IG)* | CAN communication system |
| U115187 | Lost Communication with Hybrid Powertrain Control Module (C-Bus) Missing Message | Stereo component equalizer assembly detects CAN communication malfunction in the HV system (chassis bus) for 6 second or more continuously 3 seconds after the power switch is turned on (IG)* | CAN communication system |
HINT:
*: Malfunction monitoring is not performed under the following conditions, in order to prevent erroneous detection.
- After power switch is turned on (ACC) for 3 seconds or more.
- After the auxiliary battery voltage returns to normal for 3 seconds.
- Before 3 seconds have elapsed after auxiliary battery voltage has returned to normal.
PROCEDURE
| 1. | CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Active Noise Control > Clear DTCs
|
| 2. | CHECK FOR DTC |
(a) Check for DTCs with all of the detection conditions met.
Body Electrical > Active Noise Control > Trouble CodesOK:
No DTCs are output.
HINT:
- If CAN communication system malfunction DTCs are output, they may also be output for other systems.
- If the CAN communication system has been checked and repaired in other systems, the DTC will not be output after rechecking for DTCs.
-
If the DTC is output frequently, duplicate the conditions that cause a malfunction and perform the check again, even though the DTC was not output after rechecking for DTCs.
Click here
.gif)
| OK |  | USE SIMULATION METHOD TO CHECK |
| NG | | GO TO CAN COMMUNICATION SYSTEM |
READ NEXT:
Components
COMPONENTS ILLUSTRATION *A for HV Model *B for Gasoline Model *1 REAR DOOR SCUFF PLATE LH *2 REAR DOOR SCUFF PLATE RH *3 REAR SEAT SIDE GARNISH LH *4 REAR SEAT SIDE GARNI
Installation
INSTALLATION PROCEDURE 1. INSTALL NO. 4 ANTENNA CORD SUB-ASSEMBLY (a) Connect the connector to install the No. 4 antenna cord sub-assembly. HINT: Use the same procedure for the RH side and LH side. 2.
SEE MORE:
Components
COMPONENTS ILLUSTRATION *A w/ Dust Cap - - *1 FUEL PRESSURE SENSOR (FUEL DELIVERY PIPE WITH SENSOR ASSEMBLY LH) *2 FUEL PIPE PLUG SUB-ASSEMBLY *3 DUST CAP SUB-ASSEMBLY *4 O-RING *5 NO. 1 FUEL INJECTOR BACK-UP RING *6 NO. 2 FUEL INJECTOR BACK-UP RING *7 N
Communication Error From Clearance Sonar ECU to VSC (C164B)
DESCRIPTION The electronically controlled brake system receives parking support brake system information from the clearance warning ECU assembly via CAN communication. When it is determined that there is a communication error between the skid control ECU and clearance warning ECU assembly, DTC C164B
